first commit

app/Models/Folder.php

@@ -0,0 +1,43 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class Folder extends Model
+{
+    protected $fillable = [
+        'name',
+        'parent_id',
+        'project_id',
+        'icon',
+        'color',
+        'description',
+    ];
+
+    public function descendants()
+    {
+        return $this->belongsToMany(Folder::class, 'folder_closure', 'ancestor_id', 'descendant_id')
+            ->withPivot('depth');
+    }
+    
+    public function documents()
+    {
+        return $this->hasMany(Document::class);
+    }
+
+    public function parent()
+    {
+        return $this->belongsTo(Folder::class, 'parent_id');
+    }
+
+    public function children()
+    {
+        return $this->hasMany(Folder::class, 'parent_id')->with('children');
+    }
+
+    public function project()
+    {
+        return $this->belongsTo(Project::class);
+    }
+}